Good Evening Everyone,
I am studying for the NCLEX and so far I have so much trouble with the math and conversion of ml, units, grams, grains, etc.... they just seem so confusing to me!!! Does anyone have a good and easier way that might help me remember how to calculate the conversions?? I can do the math just can't remember how to convert!
I dont like using the decimal point so this is how I remember: if you are going from smaller to larger you divide by 1000 (SLD) or larger to smaller you multiply by 1000 (LSM) always remember you are going to divide by 1000 or multiply by 1000
Also, think about cocaine. a Kg is the largest it more than a gram and so on. this section you will multiply by 1000
(larger) 1kg = 1000Gm (smaller)
(larger)1Gm = 1000mg (smaller)
(larger)1mg = 1000mcg (smaller)
if you reverse it you will divide by 1000
if the math problem is in different systems you must convert ex:
orderd cipro0.3g Iv q12h. It's avail 400mg/ml. how many Ml's will the nurse prepare
step 1. convert grams to mg's: 0.3 x 1000= 300
step 2. do the math Desired is 300 mg divided by med on hand is 400ml per 1ml times the qualtinty.
300 divided by 400 the answer is 0.75mls
for the grains it's always 60 or 65 and you X by 10
ex: md orders 325mg of tylenol on hand is 65 grains of tylenol how many tablets will the nurse give.
step 1. 65 or 60 multiply by 10
65 X10 =650
then you divided 650 by 325 ans is 2 tablets
if you do 60 x 10 =600, then divide by 325 you will get a crazy answer like 1.846 so just round up to 2. I hope this help. good luck with the nclex
Last edit by PEBBLES1 on Oct 18, '08
: Reason: forgot to add somenthin